Gasket.



A. R. MOSLER;

` GASKET.

APPLICATION FILED FEB.23. 1912. v

1,210,193. PatenteII Dec. 26,1916.

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burra .anriiuit n. i/rosnna, or NEW Yoan, 1v. Y., Assieivoa To A. aiuosnnaa co., orjivnw YORK, N. Y., A CORPORATION OF NEW YORK.

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Specification of Letters Patent. Pgfiientgdt Digg, 26, 1916 f Original application led November 19, 1908, Serial No. 463,475. `Divided and this application led February 1o LZZwz/om t may concern .f p

Be it known that I, ARTHUR R. Mosman, a citizen `of the United States, and resident of the borough of Manhattan, inl the city and State of New York, have invented a new` and useful Improvement in Gaskets, of Which the following is a specification.

This invention relates to packing rings or gaskets, and more particularly to packing ringsl or gaskets for use in .so-called spark plugs or igniters for explosive hydro-y carbon engines. n y h The objects of this invention areto provide articles of this character which Will be perfectly and permanently gas-tight, and will stand the eifectsto which they are subjectedl when used for the purpose speciiically referred to,ivithout deterioration.

'Broadly considered, this invention `contemplates a;packing ringk or gasket composed of cord consisting Wholly or-in part of asbestos, which cord iscoiled into ap-y propriate 'forni and then Wound transversely about n he previouslyfornied coils.

This applicationis a division of'iny ap-4 plication Serial No. 463,475, filed November 19, 1908, for spark plugs.

ik practical embodiment of the invention is represented in the acconipanying'draw-` ings, in which, n n

Figure l krepresents a longitudinal section of a spark plug With the gaskets shown in position, Fig. 2 represents a detail View,

partlyin section, showing the cord which has a kWire core, Fig. 8 represents a similar view showing the cord composed entirely` of asbestos, Fig. l represents a .Washer or gasket partially completed, composed ot the cord having Wire core, Fig. 5 represents the saine gasket completed, Fig. 6 represents a 'view' similar to Fig. t, showing the cord composed entirely of asbestos,

and Fig. 7 represents a view similar'to Fig.

5, showing the pure asbestos cord.

In order.` to render spark plugs for eX- plosive hydrocarbon engines gas-tight, yit has been found necessary to provide gaskets at various points. Certain-of these gaskets must be 1 affected by different influences from the others because of their more proximate location to the area of combustion, and hence their subjection to the great heat incidentaly thereto. On the other hand, some of the gaskets are located at points be further described;

23, 1912. Serial No. l679,384, f

Where the spark plug ris commonly sepa- 'rated for inspection or cleaning, and these gaskets are consequently liable to be `Worn forinjured by the assembly and disassembly of the-parts between which they are located. I have .found that asbestos forms the best packing ring for application at rpoints closest to the combustionjchamber;

andv that asbestos having a strongcenter or core, such as copper Wire, is best adapted for those places Wherel it' is subjected to the ivear incidental to separation of the' plug.

`Referringto `the drawings, the shell K- of the plug is denoted by l, the insulatingv block by 2, the conducting Wire by The insulating block 2 is `provided with fan enlarged central portions, Ianda screu7 cap 5 'servesto lhold the said block injpropery position Within the shell l.

y As the construction oi' the spark plug'itself forms no part of-the present invention, it will not n In .forming myjimproved lgasket,ivhich isfto be coinposedof asbestos having a] strong center kor core, I preferably employ copper Wire 6 having a'relativelyn thick exterior coating 0r covering of asbestos.

Thiscoidpis coiledwinto the appropriate form, which is generally circular, and into ythe proper size, Which varies greatly according to different applications. The cord may be coiled a sullicientnuinber of times to providey the required thickness for the Washer, andthen the cord is transversely Wound, spirally and in an annular course, about the previously formed coils.v

Fig. al showsthe gasket after thekcoils have been made `and When the transverse winding hasl `just been begun. After the transverse Winding is completed, the end of 'the cord may be inserted between soine of the windings in order to finish ed the gaskets, vvhichwvill then'be completed and'will appear as represented in Fig. 5.

W'hen iii'a-king a gasket which is to be entirely composed of asbestos, l preferably select asbestos cord 8, kas shown in enlarged view in Fig. 3,' and this cord is coiled and Wound into proper shape and size in exactly the same manner as previously described With regardto the cord having a copper Wire core, Figs. 6 and 7 `showing this gasket in course of construction and completion in a manner similar to that represented Vbeen foundv thatV most gaskets,

in Figs. l and 5, With regard to the gasket containing the Wire, i

In use I preferably employ one of the pure asbestos gaskets 9 at the point in the spark plug which is most closely adjacent to the inner or igniting end of the latter, While I employ one of the gaskets l() having the copper'wire core, between the shell land the cap 5 of the sparky plug, as that is the point- Where it Will receive the greatest Wear owing to the removal and replacing of the cap 5, when dismeinbering ythe spark plug.

Ihave found by experience that the gas ket 10 whichA is composed or copper Wire covered i'vith asbestos, is extremely strong and elastic, so that it will withstand the compression incidental tothe screwing dovvn oic the cap 5,v and yet'yvill expandv Vslightly when vthe cap is removed, in order that it may have again a slight yielding property when the cap 5 is replacedl and hence may always provide a gas-tight joint. It has when subject to sucl'i use, become too much compressed and rapidly Wear out,y thus losing their eiective quality. y

The pure asbestos gasket 9, is enabled-to withstand the great heat incident to the combustion in the cylinder of the engine and by reason of the fact that it is coiled and Wound as' described, it will also preserve its qualities as a slightly7 yielding, elastic and veryeffective packing. y

It Will be understood that variouschanges may be resorted to in the construction, form and arrangement of the packing 'ring Without departing fro'mithe spirit and scope 'of copies or this patent may be obtained for my invention; hence I do not Wish to limit myself strictly to the form herein shown and described', but

Vliat I claim is:

yl. A packing ring composed of a cord of suitable material coiled in the direction of the axis of the ring, said coils being bound together by an outer Wrapping of similar material .appliedV spirally and in' an annular course;Y

2. A packing ring composed of an asbestos cord coiled inthe directionv of the axis of the ring, said coils being bound together by an cuter Wrapping of similar material applied spirally and iny an annular course;

3.' A packing ring composed of a cord,

"ha-ving acopper i'virc center, coiled in the direction of the axis of the ring, said` coils being bound together by an'V outer Wrapping of similar material applied'spir'ally and in anl annular course.V

4. A packing ring composed of an asbestos cord, having a copper Wire centen-coiled in the direction of the axis of the ring, said coils being bound together bly an outer `Wrapping of similar material applied spirally and 'in an annular course.

In testimony, tli'at'I claim the foregoing as my invention, I have signed my'name in presence 'of tvvo Witnesses, this twentieth day of February, 11912.

l ARTHUR R. MOSLER.

Y Witnesses f F. Gnonen BARRY, C. SK. SUNDGREN.

five vcents each, by addressing vthev "Commssionei' of Patents, Washington, Dl C. 

